pub fn export_step(
solids: &[BrepSolid],
name: &str,
unit: &str,
timestamp: &str,
) -> Result<String, String>Expand description
Serialize exact NURBS BREP topology as an AP242 STEP Part 21 document.
unit LABELS the caller’s coordinates (SI_UNIT($,.METRE.), .MILLI.,
inch and foot conversion factors): the writer does not scale them. A
kernel body is in millimetres, so a metre-unit file wants the body
pre-scaled by 1e-3 (transform_brep with a uniform scale) first; a
millimetre body written under "meter" re-imports at 1e9 × its volume
(measured 2026-10-03).